If a person consumes 5. 33 × 105 kcal in a day and one barrel of oil can produce 3. 70 × 106 kcal, what is the equivalent of energy consumed per year by that person in terms of barrels of oil?

Answer:

Just look at which one it doesn't show.

Explanation:

Characteristics of compounds

1. Components in a compound are present in a definite proportion.

2. It has a homogeneous composition.

3. Particles in a compound are of one kind.

4. A compound is made up of one or more atoms of the same or different elements.

5. In a compound the elements are present in a fixed ratio by mass.

6. A compound can be divided into simpler substances by a chemical process.

7. The physical and chemical properties of a compound are completely different from those of its constituents.

Answer:

Explanation:

pH = -log{H+]

{H+} = 10^(-pH)

pOH = 14 - pH

{OH-} = 10^(-pOH)

pH 2.90 (the approximate pH of lemon juice

{H+} = 10^(-2.9)

pOH = 14 - 2.9 = 11.1

{OH-} = 10^(-pOH) = 10^(-11.1)

pH 3.86 (the approximate pH of sauerkraut)

{H+} = 10^(-3.86)

pOH = 14 - 3.86 = 10.14

{OH-} = 10^(-pOH)  = 10^(-10.14)

pH 10.81 (the approximate pH of milk of magnesia)

{H+} = 10^(-10.81)

pOH = 14 - 10.81 = 3.19

{OH-} = 10^(-pOH) = 10^(-3.19)

pH 4.11 (the approximate pH of orange juice)

{H+} = 10^(-4.11)

pOH = 14 - 4.11 = 9.89

{OH-} = 10^(-pOH) = 10^(-9.89)

pH 11.61 (the approximate pH of household ammonia)

{H+} = 10^(-11.61)

pOH = 14 - 11.61 = 2.39

{OH-} = 10^(-pOH)  = 10^(-2.39)

Mass of each element in one mole of sulfuric acid: Mass of hydrogen = 2 × (1.008) = 2.016 g/mol. Mass of sulfur = 1 × 32.06 = 32.06 g/mol.

...

What is the percent composition of NaHCO₃?

Element Percent Composition

Sodium (Na) 27.367%

Hydrogen (H) 1.2%

Carbon (C) 14.298%

Oxygen (O) 57.14%

Answer:

185 gms o NaBr

Explanation:

Na Br  mole weight = 22.989 +79.904 = 102.893  gm/mole

1.083 x 10^24  molecules / 6.022 x 10^23 molecules / mole = 1.798 moles

102.893  *  1.798 = 185 gms

Since we are starting from the number of atoms of Sulfur, we need to know two sets of formulas:

        ⇒ mass = (atoms ÷ Avogadro's Number) ×  molar mass

  mass = [(2.01 × 10²⁴ atoms) ÷ (6.022 × 10²³ atoms/mole)] × (32.06 g/mol)  

            = 107.01 g

The molar mass of sulfur S is 32.06 g/mol, then the mass in grams of a sample of S containing 2.01x10^24 atoms  is 107.01 g

The molar mass can be defined as the weight of one sample mole, by Multiplying  the subscript means  the number of atoms times that element’s atomic mass and add the masses of all the elements in the molecule to obtain the molecular mass.

Molar mass is  expressed in either gram ( g) or kilograms (kg).

Mass  = moles × molar mass

moles = atoms ÷ Avogadro's Number

       ⇒ mass = (atoms ÷ Avogadro's Number) ×  molar mass

 mass = [(2.01 × 10²⁴ atoms) ÷ (6.022 × 10²³ atoms/mole)] × (32.06 g/mol)  

          = 107.01 g

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Emerging scientific ideas are new theories or ideas that are gaining attention in the scientific community, but have not yet been fully accepted or confirmed.

Emerging ideas refer to the new and innovative ideas or theories that have yet to gain full scientific acceptance. While a scientific consensus is a view or theory that has been universally accepted and confirmed by multiple experiments or research, an emerging scientific idea is a new and unproven theory or idea that is gaining attention in the scientific community. These emerging ideas may also be referred to as scientific hypotheses. In contrast to scientific consensus, emerging scientific ideas have not yet been subjected to rigorous testing and confirmation.

They are generally proposed to explain new observations or experimental results, which have not yet been fully understood or explained by established scientific theories. Emerging scientific ideas can have the potential to challenge the current scientific consensus. If an emerging scientific idea is found to be valid, it can ultimately lead to the establishment of a new scientific consensus. For example, the emerging scientific idea of the Higgs boson particle led to the discovery of a new field in particle physics, which is now an established scientific consensus.

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Answer:

The answer will be listed below.

Explanation:

Kinetic Energy- Energy of motion, increases with mass

Potential Energy- Stored energy, increases with height

Both- Increases with velocity

Answer:

red blood cells and diffusion.

Explanation:

this process involves red blood cells and diffusion. Red Blood cells (RBCs) are a type of blood cell whose role is to transport oxygen from the lungs to the peripheral tissues of the body. Oxygen diffuses from the alveoli of the lungs in to the RBC's, where it binds to hemoglobin.

Diffusion is a very important process within the human body and is essential to the transport of molecules within a number of organs including the lungs, kidneys, stomach and eyes. The lungs process millions of tiny air sacs that are called alveoli, each of which are in close contact with capillaries.

The value of ΔG° for the reaction 2Cl(g) ⇌ Cl2(g) at 913 K is approximately -161.4 kJ/mol.

To calculate the value of ΔG° in kJ for the reaction 2Cl(g) ⇌ Cl_{2} (g) at 913 K, given that the equilibrium constant, Kp, is 6.32 x \(10^{29}\), we can follow these steps:

Step 1: Use the formula ΔG° = -RT ln(Kp) to calculate ΔG°, where R is the gas constant (8.314 J/mol·K), T is the temperature in Kelvin, and Kp is the equilibrium constant.

Step 2: Convert R to kJ/mol·K by dividing by 1000, so R = 0.008314 kJ/mol·K.

Step 3: Plug in the values into the formula: ΔG° = - (0.008314 kJ/mol·K) × (913 K) × ln(6.32 x \(10^{29}\)).

Step 4: Calculate ΔG°, which equals - (0.008314 kJ/mol·K) × (913 K) × ln(6.32 x \(10^{29}\)) ≈ -161.4 kJ/mol.

Therefore, the value of ΔG° for the reaction 2Cl(g) ⇌Cl_{2}  (g) at 913 K is approximately -161.4 kJ/mol.

Note that the negative sign indicates that the reaction is spontaneous in the forward direction at this temperature.

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Easier and pollutuion are correct answer of this question . Click oil basics and use the information to complete this passage that discusses how plastic production affects society.

What is Pollution?

Pollution, also known as environmental pollution, is the addition of any material (solid, liquid, or gas) or energy (such as heat, sound, or radioactivity) to the environment at a rate greater than it can be dispersed, diluted, decomposed, recycled, or stored in an innocuous form. The three basic sources of pollution—air, water, and land—are frequently categorised according to their effects on the ecosystem. Modern society is also concerned about certain types of pollution, such as plastic, light, and noise pollution. The environment, wildlife, and human health are all routinely negatively impacted by pollution of many forms.

Therefore, pollution can be defined simply as something that contaminates the environment. Pollution is the presence of dangerous compounds in the air, land, and water that can harm both living things and the environment. referring to dangerous substances that are released or brought into the environment, such as hazardous gases, liquids, or other poisonous materials. Pollutants, contaminants, or dangerous chemicals are other factors that contribute to the environment's unsuitability or safety, as are poisonous materials that contaminate the soil and the air. Pollution is another unavoidable side consequence of actions that disturb the ecosystem's biodiversity. Additionally, it jeopardises the environment's ability to endure.

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If the sample of magnesium used in a lab was contaminated with another metal that doesn't react with hydrochloric acid, then the results obtained in the experiment would be affected.

This is because the data collected during the experiment would reflect the reaction between hydrochloric acid and the contaminated sample instead of pure magnesium. As a result, the following changes in results might have been observed:

1. The mass of the contaminated sample would be higher than the mass of pure magnesium.

2. The rate of reaction between the contaminated sample and hydrochloric acid would be slower than the reaction between pure magnesium and hydrochloric acid.

3. The volume of hydrogen gas collected from the reaction would be lower than the volume of hydrogen gas collected in the reaction between pure magnesium and hydrochloric acid.

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Answer:

There are various types of proteins with a number of different functions they perform. These functions can include:

Hope this helps!

Answer:

provide structure

transport substances

fight diseases

regulate cell processes

send messages

create movement

Explanation:

'cause i did it edge 2020

Answer: (D) environmental chemistry

Explanation:

The environmental chemistry is branch of chemistry would study how pollution effects marine life. option D is correct.

Environmental chemistry is the study of the biochemical and chemical processes that occur in natural places like in forest, water bodies in air in soil and related to animals too.

Environmental chemistry is wide range of studies than air, water, soil, and chemicals. This also gives the brief account about the marine life with studying the life cycle of marine animals and plants too.

Therefore, environmental chemistry is branch of chemistry would study how pollution effects marine life. option D is correct.

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The correct answer is: a. planar. Solids can be classified according to their bonding type (e.g., ionic, covalent, metallic) and their arrangement of particles in the solid lattice structure.

The arrangement of particles can be classified as planar, which refers to a two-dimensional arrangement of particles in a specific pattern within the crystal lattice. This arrangement can include layers or planes of particles stacked on top of each other.

The other options provided (atomic, electron, dipole) do not directly relate to the classification of solids based on their arrangement. Atomic refers to individual atoms, electron refers to subatomic particles, and dipole refers to the separation of positive and negative charges within a molecule.

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The equations in relativity theory that describe motion have many terms. They work at low velocities as well as at near-light speeds, although at everyday velocities many terms essentially go to zero. At everyday speeds, the relativity motion equations become equivalent to classical Newtonian mechanics.

The motion of macroscopic objects in the absence of relativistic effects is the subject of classical Newtonian mechanics, a subfield of physics. It is based on Sir Isaac Newton's 17th-century formulation of the principles of motion. These laws offer a foundation for comprehending how objects respond to applied forces.

According to classical mechanics, the three laws of motion are:

The law of inertia states that unless a net external force acts upon an object, it will continue to be at rest or move at a constant speed.

The law of acceleration states that an object's acceleration is inversely proportional to its mass and directly proportional to the net force acting on it. F=ma in mathematics, where  F is the net force, m is the mass of the object, and a is the acceleration.

The law of cause and effect states that every action has a corresponding, opposing reaction.

The idea of conservation laws, such as the conservation of energy and the conservation of momentum, is also a part of classical mechanics. According to these rules, unless other forces are acting on a system, the total amount of energy and momentum in that system stays constant.

In engineering and daily life, classical mechanics is frequently used to explain how objects move, including how machines, vehicles, and projectiles behave. Although relativistic effects can be disregarded, it can only be applied to systems where the speeds and energies involved are substantially slower than the speed of light.

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Answer:

Z

Explanation:

Answer:

\(\boxed {\boxed {\sf 0.0018 \ mol \ H_2 O }}\)

Explanation:

First, we need to find the molecular mass of water (H₂O).

H₂O has:

Use the Periodic Table to find the mass of hydrogen and oxygen. Then, multiply by the number of atoms of the element.

There are 2 hydrogen atoms, so multiply the mass by 2.

Now, find the mass of H₂O. Add the mass of 2 hydrogen atoms and 1 oxygen atom.

Next, find the amount of moles using the molecular mass we just calculated. Set up a ratio.

\(0.032 \ g \ H_2 O* \frac{ 1 \ mol \ H_2 O}{18.0152 \ g \ H_2 O}\)

Multiply. The grams of H₂O will cancel out.

\(0.032 * \frac{1 \ mol \ H_2 O}{18.0152 }\)

\(\frac{0.032 *1 \ mol \ H_2 O}{18.0152 }\)

\(0.00177627781 \ mol \ H_2 O\)

The original measurement given had two significant figures (3,2). We must round to have 2 significant figures. All the zeroes before the 1 are not significant. So, round to the ten thousandth.

The 7 in the hundred thousandth place tells us to round up.

\(0.0018 \ mol \ H_2 O\)

There are about 0.0018 moles in 0.032 grams.

Answer:

D. tap water

keep on learning!

Answer: ethanol

Explanation: as it is a pure compound and can sometimes be a mixture while all the rest are mixtures.

Answer:

In summary, the ecological balance brings the existence of the world. Earth's inhabitants such as human beings, plants, animals and other micro living organisms continue to survive. These species get the conducive environment to multiply and thrive. The world gets to produce sufficient food for all species.

may this help u

Explanation:

balance between plants & animals is essential because plants are autotrophs , they can make their own food but animals are heterotrophs , they cannot prepare their own food so they have to depend on plants ( autotrophs) for their food.

moreover, to prepare their food plants need C02 , WHICH IS RELEASED IN THE ENVIRONMENT BY ANIMALS ( BY RESPIRATION) & IN TURN THEY RELEASE Oxygen which is essential for the life of animals & also to maintain balance in nature , the number of plants should be equal to the number of animals.

Since the beaker was heated we can asume that only magnesium cloride is left in the beaker, therfore the difference between the beaker with magnesium chloride and the empty beaker give the mass of magnisium chloride:

Answer:

Yes. As soon as acceleration disappears, the object just continues with whichever speed it has. The acceleration changes speed; is there no acceleration, then speed is constant.

Explanation:

The claim that vinyl gloves have a higher leak rate than latex gloves is supported by the study at a significance level of 0.005.

To determine if vinyl gloves have a higher leak rate than latex gloves, we can conduct a hypothesis test.

The z-value is calculated as:

z = (p₁ - p₂) / √((p₁(1 - p₁) / n₁) + (p₂(1 - p₂) / n₂))

where p₁ and p₂ are the sample proportions, and n₁ and n₂ are the sample sizes.

Certainly! Let's calculate the z-value to determine if vinyl gloves have a higher leak rate than latex gloves.

For vinyl gloves:

Sample size (n₁) = 240

Leaking gloves (x₁) = 0.63 * 240 = 151.2 (approximated to 151)

For latex gloves:

Sample size (n₂) = 240

Leaking gloves (x₂) = 0.07 * 240 = 16.8 (approximated to 17)

We will calculate the z-value using the formula:

z = (p₁ - p₂) / √((p₁(1 - p₁) / n₁) + (p₂(1 - p₂) / n₂))

where p₁ and p₂ are the sample proportions.

p₁ = x₁ / n₁ = 151 / 240 ≈ 0.629

p₂ = x₂ / n₂ = 17 / 240 ≈ 0.071

Calculating the z-value:

z = (0.629 - 0.071) / √((0.629 * (1 - 0.629) / 240) + (0.071 * (1 - 0.071) / 240))

z ≈ 13.239

The calculated z-value is approximately 13.239. To determine if the claim is supported, we compare this value to the critical z-value for a one-tailed test at a significance level of 0.005.

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Answer:

Luster

Explanation:

Luster is how the surface of a mineral reflects light. It is not the same thing as color, so it crucial to distinguish luster from color. For example, a mineral described as “shiny yellow” is being described in terms of luster (“shiny”) and color (“yellow”), which are two different physical properties.

Answer:

A Minerals Luster

EXPLANATION:

The Minerals luster is how shiny a mineral is. Luster means a shine or radiance of something, like a polished crystal it gives a sheen of light because it is shiny versus a dirty, worn-out crystal.

Answer:

weigh it and divide the weight by the molecular weight. :) good luck!!

Explanation:

Answer:

TO FIND THE NUMBER OF MOLES IN A SAMPLE, SIMPLY WEIGHT IT AND DIVIDE THE WEIGHT BY THE MOLECULAR WEIGHT. THE QUOTIENT IS EQUAL TO THE NUMBER OF MOLES.

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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To determine the number of moles of argon atoms in one million (1,000,000) argon atoms, we need to use Avogadro's number, which states that one mole of any substance contains 6.022 × 10^23 particles (atoms, molecules, etc.).

Given that we have one million argon atoms, we can divide this quantity by Avogadro's number to find the number of moles:

Number of moles = 1,000,000 atoms / (6.022 × 10^23 atoms/mol)

Calculating this expression gives us approximately 1.66 × 10^-18 moles of argon atoms.

Comparing this result to the given answer choices:

a. 1.7×10−18: This is the closest value to our calculated result.

b. 6.0×10^23: This represents Avogadro's number, which is not the correct answer.

c. 1.0×10−6: This is one millionth of a mole, which is not the correct answer.

d. 3: This is not the correct answer.

e. 1.0 × 10^6: This is one million moles, which is not the correct answer.

Therefore, the correct answer is (a) 1.7 × 10^-18 moles of argon atoms.

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The resulting reaction products are an ionic salt (NaCl) and an oxysalt (Ca3(PO4)2.

When NaCl is in contact with water, it dissolves and the water molecules separate their ions, therefore it will be in the aqueous phase.

In contrast, Ca3(PO4)2 is not soluble in water, therefore the molecule will settle out of solution as solid crystals.

So the answer will be C. 3NaCL(aq)+Ca3(PO4)2

Precipitates are insoluble ionic solid products of a reaction, formed when certain cations and anions combine in an aqueous solution. The determining factors of the formation of a precipitate can vary.

When propanal reacts with excess of methanol in the presence of HCl, it forms 1,1-dimethoxy propane.

C2​H5​−CHO+2CH3​OHHCl​(1,1−diethoxy propane)C2​H5​−CH(OCH3​)2​​

Propanol belongs to the primary type of alcohol. The chemical formula of propanol is CH3CH2CH2OH. This is a colourless liquid and is also sometimes called propan-1-ol, n-propyl alcohol, 1-propyl alcohol, or n-propanol.

(i) Propanal having α-hydrogen atom undergo aldol condensation in presence of dil. NaOH and forms 3-hydroxy-2-methyl pentanal.

C2​H5​−CHO+(dilute)NaOH​⟶C2​H5​−OH∣CH​−CH∣CH3​​−CHO

(ii) The carbonyl group of propanal is reduced to CH2​ group on treatment with hydrazine followed by heating with KOH in ethylene glycol and the product formed will be propane.

C2​H5​−CHONH2​−NH2​−H2​O​C2​H5​−C∣∣N​−NH2​KOH/ethylene glycolheat​C2​H5​−CH3​+N2​

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